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Composition Influence on the Properties of Titanium-Doped Gamma Iron Oxide Nanoparticles Prepared by Laser Pyrolysis Method

  • Ion Morjan (a1), Rodica Alexandrescu (a1), Florian Dumitrache (a1), Ion Sandu (a1), Monica Scarisoreanu (a1), Lavinia Albu (a1), Iuliana Soare (a1), Ion Voicu (a1), Bohumil David (a2), Oldrich Schneeweiss (a2), Claudiu Fleaca (a1), Ernest Popovici (a1) and Victor Ciupina (a3)...

The aim of this work is the structural and sensing characterization of titanium-doped gamma iron oxide nanocomposites. These nanopowder materials were synthesized by the laser pyrolysis technique. It is based on the resonance between the emission of a CW CO2 laser line and the infrared absorption band of a gas (vapour) precursor. Basically, sensitised iron pentacarbonyl and titanium tetrachloride-based mixtures were used as gas-phase reactants. The compositional characterization of the synthesized nanostructures was performed by means of different analytical techniques. Introducing Ti in the Fe2O3 network in small quantities (< 1 %) seems to have little influence on titanium doped powder morphology (mean grain size ∼ 5nm) but increases the sensitivity of titanium doped iron oxide nanopowders with more then 20 % relatively to pure maghemite.

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